<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>label-input</title>
</head>
<body>
    <div>
        <label for="test">测试</label> 
        <input type="" id="test">
    </div>
</body>
</html>